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首页> 外文会议>International Conference on Extrusion and Benchmark >Modeling and Simulation of Microstructure Evolution in Extruded Aluminum Profiles
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Modeling and Simulation of Microstructure Evolution in Extruded Aluminum Profiles

机译：挤出铝型材中微观结构演化的建模与仿真

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摘要

The purpose of this work is to predict the microstructure evolution of aluminum alloys during hot metal forming processes using the Finite Element Method (FEM). Here, the focus will be on the extrusion process of aluminum alloys. Several micromechanical mechanisms such as diffusion, recovery, recrystallization and grain growth are involved in various subsequent stages of the extrusion and the cooling process afterward. The evolution of microstructure parameters is motivated by plastic deformation and temperature. A number of thermomechanical aspects such as plastic deformation, heat transfer between the material and the container, heat generated by friction, and cooling process after the extrusion are involved in the extrusion process and result in changes in temperature and microstructure parameters subsequently. Therefore a thermomechahically coupled modeling and simulation which includes all of these aspects is required for an accurate prediction of the microstructure evolution. A brief explanation of the isotropic thermoelastic viscoplastic material model including some of the simulation results of this model, which is implemented as a user material (UMAT) in the FEM software ABAQUS, will be given. The microstructure variables are thereby modeled as internal state variables.
机译：这个工作的目的是过程中使用有限元法（FEM）的热金属成型工艺来预测铝合金的显微结构演变。这里，重点将放在铝合金的挤压过程。几个微机械机制，例如扩散，恢复，再结晶和晶粒生长所涉及在挤出和冷却过程之后的各种后续阶段。的微结构参数的演变是通过塑性变形和温度的动机。热量由摩擦产生一些热机械方面，例如塑性变形，材料和容器之间的热传递，和冷却过程中的挤出后参与在温度，并随后变化微结构参数的挤出过程和结果。因此包括所有的这些方面一个thermomechahically耦合建模和仿真所需的显微结构演变的准确预测。各向同性热弹性粘塑性材料模型包括一些这种模式，其作为在FEM软件ABAQUS用户材料（UMAT）来实现的模拟结果的一个简短的说明中，将给出。微结构变量从而建模为内部状态变量。

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